Conduit fitting



Feb. 4, 1930. F. J. RAYBOULD 1,745,954

` coNDUIT FITTING Filed April 4, 1 928 Egg .Wim/E TOR. gw

Patented lF eb. 4,1

UNITED f sTATEslf VFRANK zr. RAYBOULD, oF ERIE, rENNsYLvANIA,fAssIeNonfmo ERIEMALLEABLEIRON f' ooMPANY,oF vEier-E, rENNsYLvANImIAoonPoaaTIoNfoF PENNSYIMANIAj Application filed April 4, 1928."l V'Serial No. 267,415.

This invention is 'designed to supply a tingsto conduit-receiving openingsparticularlyopenings inthe Walls of lnocloout 5 boxes and the fitting as shown is particularly Y designed for 'use' With threadless conduits.

Features and details of the inventionvvill 'ap-v pear vfrom the specification and claims,l

-V A preferredembo'rdiment ofthe invention` 1s illustrated inthe accompanying drawings l a body havingl aconduit opening; an expan "Fig 1 is a side elevatiom-partly VinV section, of the fitting in place.l v L@ n 'Fig'. 2 an endl vieW of the outer expanding Fig. 3 a side elevation,4 part-ly 1n' section, v j 'of said sleeve. l

' Fig. 4 an end view of the Vcontracting sleeve.` Fig. V5 an'elevaltiom lpa'rtlyin section, ot'

the contractingsleeve.

.2 an opening through the Wall.

A. sleeve 8 isvarranged in 'the opening.'

This sleeve is provided With a groovey 4,'the Walls ofy the groove engaging'the opening y 25 2. The sleeve is provided Witha slot 5 rendering the sleeve Vexpansible and the sleeve -is provided with a Wrench-hold 6 and inner screw threads', these screvv threads beingv `0 tapered. y I g V i,

Within the expanding sleeve 3 isa conl tracting sleeve 8, this sleeve being rendered contractible by a slot 9. It' has a guard 10 at its inner end and is adapted to receive and clamp a lconduit 11. It hasa Wrench-'hold Y v13l operating inthe screw threads 7.

In putting the'material in place the outer i expanding sleeve is passed through the open i Y ing. The inner sleeve isjscrewed into it *l The conduit'put 1n place andthe inner sleeve set up. Theeiiect of the tapered engaging v threads of the innerV and outer sleeves is yto expand the outer sleeve into clamping engage-ment with thevvalls of theopening and v at the same time to contract the vinner sleeve intol clamping engagement with the conduit sothat as afinal result there is a rigid union of all the parts. v 1 l What I claimas new is Y 1; In a conduit fitting, thefcombination of imma the body erwan yof. the 100x,l and* a bodyha-ving aconduit opening anY expanl I; f

sible isleeve' inthe opening; acontractible sleevelin the expansible sleeve,saidmsleeves 'hevig 'Wedgng vSurfaces in engagement; and operable `With a relatively axial movement of the, sleevesto ,expand the ,outer sleeve and contract the inner sleeve; 'and means forcing ,the sleeves axiallyrelativev to each other,l

2. In a yconduit fitting; the combination of op sible sleeve 'in the opening; aacontractible sleeve in the expansibl'e sleeve, said sleevesv l f having Wedging surfaces in engagement and operable with a relatively axial movement of l Y the sleeves to expand the outer sleeveand,`

contract the inner sleeve; and means forcing' y'theA sleeves" axially relatively to eachV other `comprising a screw v'n :onneotion between-fthe `3. InaJ conduit fitting, the combinationof 17 'i sleeves.A

a body having a conduit opening; an expansible .sleeve in the opening having a tapered Y interior screw thread ;V and a contractible `sleeve in the expansible sleeve, said contracti' Y yble sleeve having tapered exteriorscrew thread engaging the 'screw thread of the expansible sleeves,` said screw threadsv Vforming A a means Vfor keffecting rela-tive movement of the/sleeve. j

sleeve, saidsleeves havingv vvedging surfaces` in engagement and operable with a relatively -5. Ina conduit fitting7 the combination of sleeve inthe expansible sleeve,said sleeves.

' having Wedging 'surfaces inengagement and' operable With a vrelatively axial movement of the sleeves to expand the outer sleevev and contract the inner sleeves and means eeoting relative axial movement of the sleeve.

laxial movement of the sleeves to expand the vouter sleeve and contract the inner sleeve;

and means forcing the sleeves axially rela-V vktively to each other.- Y

loof 4. VIna conduit fitting, the combination of 80 a body having a conduit opening; an expan'- f sible sleeve in the opening7 said sleeve having a groove on its outer surface, the Walls of thegroove engaging the Walls 'of the open# A 12 at its outer end and-tapered screvv threads ing; a contract'ble `sleeve in the expansible 6. The combination of an expansible sleeve; and a contractble sleeve Within the expansble sleeve, said sleeves having Wedging surfaces adapted to expand the expansible sleeve and contract the contraotlole sleeve upon a relative endwse movement of the sleeves.

7. The combination of an expansible sleeve;Y a` -oontractlble Asleeve Within the eX- pansible sleeve, Said sleves'havi'ng" Wedgig" surfaces "adapted to ezpzincl the ezpalns'ible sleeve and contract the contractble sleeve vupon a relative endwise movement of the sleeves; and means for forcing thetsle'eves endWise relatively to each other.

8; The comoination ofv a'. body having an opening'theren; an expansible Sleeve in the Y opening';la contifaotble sleeve' in the expansilble sleeve a member With-nthe oont'rstoti lille sleeve-; and means ope/eating om Sand' sleevesto expand' the outer sleeve and. ciont-i'act the inner Sleeve?.A

In testimony whereof I have hereunto setVVV my hncl. l i

FRANK J. R-YBOULD; 

